Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
0= x4 + 2x3 - 3x2 - 4x + 12
0= x4 + 2x3 - 3x2 - 4x + 12
Natural Language
Math Input
Extended Keyboard
